* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

html,
body,
#app {
  height: 100%;
}

.w {
  width: 1200px;
  margin: 0 auto;
}

.clearfix {
  zoom: 1;
  &::after,
  &::before {
    content: '';
    display: table;
    clear: both;
    height: 0;
    visibility: hidden;
  }
}

img {
  vertical-align: middle;
}

a {
  text-decoration: none;
}

li {
  list-style: none;
}
